package com.nowcoder.community.community.controller;

import com.nowcoder.community.community.service.AlphaService;
import com.nowcoder.community.community.util.CommunityUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.*;

@Controller
@RequestMapping("/alpha")
public class AlphaController {

    /**
     * IoC思想：控制反转、依赖注入
     */
    @Autowired
    private AlphaService alphaService;

    @RequestMapping("/hello")
    @ResponseBody
    public String sayHello(){
        return "Hello Spring Boot";
    }

    @RequestMapping("/data")
    @ResponseBody
    public String getData() {
        return alphaService.find();
    }

    /**
     * 获取request和response数据
     * @param request
     * @param response
     */
    @RequestMapping("/http")
    public void http(HttpServletRequest request, HttpServletResponse response){
        //获取请求数据
        System.out.println(request.getMethod());
        System.out.println(request.getServletPath());
        System.out.println(request.getContextPath());
        Enumeration<String> enumration = request.getHeaderNames();
        while(enumration.hasMoreElements()){
            String name = enumration.nextElement();
            String value = request.getHeader(name);
            System.out.println(name+":"+value);
        }
        System.out.println(request.getParameter("code"));

        //返回响应数据
        response.setContentType("text/html;charset=utf-8");
        try(
                PrintWriter writer = response.getWriter();
                ) {
            writer.write("<h1>牛客网</h1>");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }


    /**
     * GET请求（两种方式）
     */
    // 【/students?current=1&limit=20】
    @RequestMapping(path = "/students",method = RequestMethod.GET)
    @ResponseBody
    public String getStudents(
            @RequestParam(name = "current",required = false,defaultValue = "1") int current,
            @RequestParam(name = "limit",required = false,defaultValue = "10") int limit){
        System.out.println(current);
        System.out.println(limit);
        return "some students";
    }
    // 【/student/101】
    @RequestMapping(path = "/student/{id}",method = RequestMethod.GET)
    @ResponseBody
    public String getStudent(@PathVariable("id") int id){
        System.out.println(id);
        return "a student";
    }
    /**
     * POST请求
     * 参数名和POST请求体的参数名保持一致
     */
    @RequestMapping(path = "/student",method = RequestMethod.POST)
    @ResponseBody
    public String saveStudent(String name,int age){
        System.out.println(name);
        System.out.println(age);
        return "success";
    }


    /**
     * 响应html数据（两种方式）
     */
    @RequestMapping(path = "/teacher",method = RequestMethod.GET)
    public ModelAndView getTeacher(){
        ModelAndView mav = new ModelAndView();
        mav.addObject("name","张三");
        mav.addObject("age",30);
        mav.setViewName("/demo/view");
        return mav;
    }
    @RequestMapping(path = "/school",method = RequestMethod.GET)
    public String getSchool(Model model){
        model.addAttribute("name","北京大学");
        model.addAttribute("age",80);
        return "/demo/view";
    }

    /**
     * 响应JSON数据（异步请求）
     * Java对象 --> JSON字符串 --> JS对象
     */
    @RequestMapping(path = "/emp",method = RequestMethod.GET)
    @ResponseBody
    public Map<String,Object> getEmp(){
        Map<String,Object> emp = new HashMap<>();
        emp.put("name","张三");
        emp.put("age",23);
        emp.put("salary",8000.00);
        return emp;
    }
    @RequestMapping(path = "/emps",method = RequestMethod.GET)
    @ResponseBody
    public List<Map<String,Object>> getEmps(){
        List<Map<String,Object>> emps = new LinkedList<>();
        Map<String,Object> emp = new HashMap<>();
        emp.put("name","张三");
        emp.put("age",23);
        emp.put("salary",8000.00);
        emps.add(emp);
        emp.put("name","李四");
        emp.put("age",24);
        emp.put("salary",9000.00);
        emps.add(emp);
        return emps;
    }

    /**
     * cookie示例
     */
    @RequestMapping(path = "/cookie/set",method = RequestMethod.GET)
    @ResponseBody
    public String setCookie(HttpServletResponse response){
        // 创建cookie
        Cookie cookie = new Cookie("code", CommunityUtil.generateUUID());
        // 设置cookie生效的范围
        cookie.setPath("/community/alpha");
        // 设置cookie的生存时间
        cookie.setMaxAge(60 * 10);
        // 发送cookie
        response.addCookie(cookie);

        return "set cookie";
    }
    @RequestMapping(path = "/cookie/get",method = RequestMethod.GET)
    @ResponseBody
    public String getCookie(@CookieValue("code") String code){
        System.out.println(code);
        return "get cookie";
    }

    /**
     * session示例
     */
    @RequestMapping(path = "/session/set",method = RequestMethod.GET)
    @ResponseBody
    public String setSession(HttpSession session){
        session.setAttribute("id",1);
        session.setAttribute("name","Test");
        return "set session";
    }
    @RequestMapping(path = "/session/get",method = RequestMethod.GET)
    @ResponseBody
    public String getSession(HttpSession session){
        System.out.println(session.getAttribute("id"));
        System.out.println(session.getAttribute("name"));
        return "get session";
    }

    /**
     * ajax示例
     * @param name
     * @param age
     * @return
     */
    @RequestMapping(path = "/ajax",method = RequestMethod.POST)
    @ResponseBody
    public String testAjax(String name,int age){
        System.out.println(name);
        System.out.println(age);
        return CommunityUtil.getJSONString(0,"操作成功!");
    }


}
